minetest/minetest — pull request #1995 by paramat (2014-12-20 05:49:08+00:00)
Title: Re-add hacky fix for underwater grass, to fix mgv7 user's biomes

Fixes TenPlus1's problem as described on IRC http://irc.minetest.ru/minetest/2014-12-18#i_4069533
Removes my problematic code and returns to hmmmm's hacky fix, this re-enables 2 layers of biome material under water.